Car construction.



H. M. PPLAGER.

GAR CONSTRUCTION.

APPLICATION mum JAN. 23. 1011.

Patented June 20, 1911.

Mai.

INVENTOI? HHRRY 2:525

,qr rx a 0 2 M L G! s s M w z T 5 M STATES PATENT OFFICE.

HARRY M. PFLAGER, OF ST. LOUIS, MISSOURI.

can CONSTRUCTION.

Specification of Letters Iatent. Patented June 20, 1911.

Application filed January 23, 1911. Serial No. (304,207.

To all whom it may concern:

Be it known that I, HARRY M. PFLAGER, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Car Construction, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the Same, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a top plan view of one end of my improved construction; Fig. 2 is a sectional'view through the same in the vertical plane of the bolster; and Fig. 3 is a side elevational view of the same partly'in section. Fig. 4 is a detail view of one of the spring followers.

This invention relates to a new and useful improvement in car construction, the ob- I ject being to support the car at or near its in the journal box whereby the wheels may be displaced laterally so as to accommodate themselves to the track and save flange wear.

With these objects in view, the invention consists in the construction, arrangement and combination of parts, all of which will hereinafter be more particularly described and pointed out in the claims.

In the drawings, 1 indicates the side sills, 2 the center sills, and 3 the end sills, all such parts being of any usual or approved construction.

4 indicates the body bolster which is preferably made deepest at its center to accommodate the center sills. Near each end of this bolster are laterally extending flanges 21 are driven thereon, as usual.

5 constituting a bearing for springs or a spring seat, and from the center of this-bearing depend pivot extensions 6 through which pass king bolts 7 8 is a spring follower constituting a spring seat for the supporting springs v9 which are held in position thereon by means of the teats or lugs 10.

11 are interlocking extensions extending down alongside the king-pin hearing or pivot'extension 6.

12 is a spring seat or follower preferably fixed to the casting 14 and having --an upwardly extending tubular bearing 13 cooperating with the bearing 6. This tubular bearing 13 is recessed at its upperedges to receive the lugs 11 whereby the spring followers are caused to rotate together about the cylindrical king-pin bearing as a center,

and are permitted telescopic movement to accommodate expansion and compression of the supporting springs 9 interposed between them.

t 14; is a casting formed with anopening to receive the king-pin 7 and having slots in the side walls thereof for the passage of the locking pin which holds the king-pin in position. This casting 14 constitutes a support for the spring seat 12 which is preferably attached thereto, and also serves as a strut for the truss-structure of which 15 is the compression member and 16 the tension member, both of said members being seated in appropriate grooves in the top and bottom facesof the strut casting 14. The bars 15 and 16 extend over journal boxes 17- where they are secured by means of suitable pedestal bolts 18, said bolts also passing through the bottom tie-bar 19 which secures .90 20 indicates a cross tieebar extending the lower portions of the box together;

across the truck frames, and tying them 'tov gether.

the axles which'have the wheels 22 These axles have collared ends and pass into the journal boxes where they cooperate with brasses 23, said brasses being held in position by wedges 24. Instead of these wedges fitting tightly against the top wall of the box so that they are held rigidly in position, I provide each wedge with a circular boss 25 on its upper face which cooperates with a seat in the top wall of the box.

In operation, when the car takes a curve,

'the front pair of wheels will be displaced laterally in one direction and the companion a right-angular relation to the bolsters 4.

It will be observed thatin taking curves the wheel axles and truck frames are maintained in parallelism, each collared axle assisting, by its thrust in opposite directions, in so preserving this relation. The tie-bar 20 is so connected that it permits this slight pivotal. action of each truck frame, and, if de-' sired, instead of having separate bolts for securing the tie-bar in position, the king-bolt may pass therethrou h and-be provided with a nut on its lower en The spring followers are caused to rotate in unison, and in this manner torsional strain on the springsv is avoided, but the expansive and compressive action of the springs is not interfered with,

due to the telescopic construction of the tubular extensions of said spring follower.

Instead of swiveling the wedges in the journal boxes, it is obvious that the journal boxes themselves may be swiveled in the side truck frames, and in this manner non-swivelin wedges could be employed.

Vhat I claim is:

1. In car construction, the combination of an under framing, side truck frames each having two or more journal boxes, said I frames being pivotally connected to the the ends of each under framlng and connections between the ends of each pair of frames at the ends of the car whereby parallelism is maintained, the connected frames at one end of the car being movable independently of the connected frames at the opposite end of the car. 2. In car construction, an under frame, truck frames each pivotally connected thereto, said truck frames havin two or more journal boxes, wheels and ax es mounted in said journal boxes and having a swinging relation thereto, and means for connecting air of truck. frames for maintaining paral elism thereof.

frames each having pivotal relation to said bolster, journal boxes, and axles mounted in said journal boxes, said axles having pivotal relation to said journal boxes.

5. In car construction, an under frame, side truck frames each having pivotal relationthereto, springs interposed between side truck frames and the under frame, a plurality of journal boxes in each of said side truck frames, and axles in said journal boxes and extending across from truck frame to truck frame the connected frames at each end of the car being independently movable. .6. In car construction, a side truck frame having a pivotal bearing, an underframe having a pivotal bearing in the vertical I plane of the said side truck frame, springs arranged around said pivotal bearing and interposed between said underframe and said side truck frames, and spring seats for said springs, said spring seats having telescopic connection with. each other.

7. In car construct-ion, a side truck frame having a pivotal bearing, an underframe having a pivotal bearing in the vertical plane of the said side truck frame, springs arranged around said pivotal bearing and interposed between said -underframe and said side truck frames, and spring seats for said springs, said spring seats being connected so as to move in unison and permit expansion and compression of said springs. 8. In car construction, an underframe, side truck frames each having pivotal relation thereto,'journal boxes carried by the said side truck frames, axles mounted in said journal boxes, wheels on said axles, and connections permitting said axles to occupy other than right-angular relation to said side truck frames.

9. In car construction, an underframe, side truck frames each having pivotal relation thereto, journal boxes, axles mounted in said journal boxes, wheels on said axles,

brasses and wedges interposed between'said axles and said ournal boxes, said wedges having pivotal relation to'said journal boxes and capable of independent horizontal movement relative thereto.

10. In car construction, an underframe having pivot bearings arranged at or near the four corners of the underframe, side truck frames having pivotal relation to each of said pivot bearings, journal boxes arranged in said side truck frames, axles arranged in said journal box, and connections permitting said axles to assume other than right-angular relations=to said side truck frames and their journal boxes when the latter are swung upon their pivots.

11. In car construction, the combination of an underframe, side truck frames each having pivotal relation thereto, journal boxes mounted thereon, axles mounted in said journal boxes and having pivotal relation thereto whereby said axles may assume signature in the resence of two witnesses, other thzllnfrig'ht-angulalilrelation tob said this 17th day of anuary, 1911. side trucc rames and t eir' journal oxes, e and a tie-bar connecting said side truck HARRY PFLAGER 5 frames at points coincident with their axes Witnesses: of movement. M. P. SMITH,

In testimony whereof I hereunto aflix my I BLANOHE L. CROWLEY. 

